Yarn feeding and changing mechanism for knitting-machines.



R. W. SCOTT.

YARN FEEDING AND CHANGING MECHANISM FOR KNITTING MACHINES.

' APPLICATION MD June. 1914.

1,159,873. 'Patented Nov. 9,1915.

' 2 SHEETS-SHEET I. 52?" 7 3' J:' :Z i m' I 1, I: '89 6'08 27 16.0 6'02295 R. W. SCOTT. YARN FEEDING AND CHANGING MECHANISM FOR KNITTINGMACHINES. APPLICATION FILED JULY 20, I914.

1,159,873. Patented Nov. 9, 1915.

2 SHEETSSHEET 2.

U TE STAES ROBERT W. SCOTTpOF BOSTON, MASSACHUSETTS, ASSIGNOR 'IO SCOTT& WILLIAMS INCORPORATEDQOF CAMDEN, NEW JER YARN FEEDING AND CHANGINGApplication filed July 20. 1914.

To all "whom it may concern:

Be it known that 1, ROBERT V. Soo'r'r, a citizen of the United States,and resident of Boston. in the county of Suffolk and State ofHassachusetts, have invented certain new and useful Improvements in YarnFeeding and (hanging Mechanism for Knitting-Machines, of which thefollowing is a specification.

My invention relates to improvements in yarn feeding and associatedmechanism for the improved production of split-foot, sectionally splicedand other forms of fabric.

I have illustrated my device as an im provement upon the mechanismshown, described and claimed in my application No. 845,844, filed June18, 1914, but it will be evident that the new devices may be applied toother forms of knitting machinery.

In the accompanying drawings, Figure 1 is a vertical sectionillustrating the pattern mechanism. the yarn guides, the stitch cams.and the needle cylinder of a circular knitting machine as one instanceof the application of my devices; similar to Fig. 1 illustrating anotherposition of the parts; Fig. 3 is a similar view illustrating a thirdposition of the parts; Fig. 4 is a partial development of the interiorof the cam cylinder; Fig. 5 is a section in plan taken above theweb-holder bed; Fig. 6 is a detail development showing a modification;Figs. 7 and 8 are illustrations of a modified actuating connection; Fig.9 is a diagram illustrating the relation of the needles, the yarn, andthe yarn guide actuating cams; Fig. 1.0 is a detail of the yarn guideactuating leversp Fig. 11 is a diagram showing three positions of one ofthe yarn guides; and Figs. 12 and 13 are details showing modified yarnguide actuating cams. Fig. 14 is a detail section on line 14, 14 of Fig.6.

In my said application I disclosed a yarn changing and yarn splicingdevice comprising a series of yarn guide levers pivoted above andoutside of the circle of needles in a circular knitting machine, and adevice for lifting and lowering said yarn guide levers to change'ut'heiryarns comprising a series of independent thrust bars, in contact attheir lower-ends with a pattern cam surface.

Specification of Letters Patent.

Fig. 2 is a detail SEY, A COBPOR-ATION OF NEW JERSEY.

MECHANISM FOR KNITTING-MACHINES.

Patented Nov. 9, 1915.

Serial No. 851,931.

Qne of the yarn guide levers was, for sectional splicing, provided onits under side with a lug against which the nose of its thrust bartakes, so that said thrust bar when moved laterally elevates its yarnguide, to sharply remove the yarn thereof from the needles, the yarnbeing returned whenever the bar is permitted to resume its normallateral position. A cam carried by the web-holder bed was provided tomove the lug on the bar for this purpose, the pattern cam lifting thebar lengthwise to determine whether or not. its lug was in range of. thesaid cam. and hence to determine the timely operation of the splicingdevice.

The present invention provides in addition mechanism for an exchange ofyarns occurring during rotary knitting in the same course at a pluralityof separated intervals about the knit tube, provision being made toretain the yarn guide about to go out of work in its operative.position. after the yarn guide put into work shall have begun to feed anew yarn to the needles. My new devices provide for anexchange of thisnature occurring persistently at the same needle Wales for course aftercourse, to provide a longitudinally split or sutured fabric, such forinstance as will be suitable for a substituted fabric above the heel atthe back of a stocking, or for a split foot, which may if desired beprovided with a sole of a heavier yarn, or a yarn different in color orkind from the fabric of the leg and the top thereof. The said devicesprovide for the above functions without increase in the necessary numberof yarn guides, my invention comprising means for the normal operationof the yarn-guides employed for split foot knitting as yarn-changingyarnguides. I

, Referring now to Fig. 1 the machine selccted for an illustrativeinstance comprises a.- rotary needle cylinder 260 driven by a. gear 130to which cylinder is attached a web-holder bed 295 on which a web-holdercam cap 300 is capable spect to the web-holders 290. It will beunderstood, however, that my invention is not restricted to machines ofthis type, the devicesfor performing my new purposes being capable ofapplicationwithout change of rotation with re-,

in their essentials to knitting machines in which the needle cylinder isstationary and the needle cams movable. The bed-plate D on 'which saidneedle cylinder rotates carries a standard 401 upon which is pivoted at552 a latch guard ring carrying a stud 554 upon which a series of yarnguide levers F are journaled to occupy under the influence of springs Fa normal operative lower position of rest at -which their inner endsstand upon a throat plate 559 bridging agap in .the latch ring throughwhich the yarns are The said devices, as at the neighborhood of given tothe needles. shown in Fig. 1, are the plane central of which oneinstance is shown in Fig. 6, said cams usually comprising stitch cams 6and 7, top center cam 8 and bottom center cam 9'. Inwaddit-ion to theabove mentioned devices. I provide two or more yarn guides F F", havinglugs 5 on their under faces, to cooperate with the upper beveled ends ofthrust bars 460 associated with said yarn guide levers, and archedundersides somewhat higher than the remaining guides F, to provide forlost motion between the upper ends of said bars and said yarn guidelevers. Each of the thrust bars occupies a slot in a comb 451 attachedto a stud 450 fast in the frame of the machine, the upper end of the barbeing guided by a comb 462 attached to the standard 401. The said thrustbars 460 have lateral freedom away from the axis of the machine at thecomb 462 as illustrated said points.

in Figs. 1, 2 and 3. The arrangement is such that a lateral movementaway from the axis of the cylinder 260 at the upper ends of the thrustbars will elevate the yarn guide levers by movement against the cam1ugs.5.

I may provide upon any member of the organized machine moving inrelation to or in unison with the needles means for actuation'ofconnections such as the thrust bars 460 leadmg to the yarn-guides tocause the local movement of said connections in time with the passage ofone or more points in the circle of needles, to change the yarn at Thering 130 or its driving gear, for instance, moving in unison with theneedles, may be employed for this purpose, but I prefer to employ thefollowing mechanism. 1

The thrust bars 460 for the guides F F may be alike with the exceptionofthe provision upon each'of them at respectively different distancesfrom the bottom of the bars, which lugs when the bottoms of the bars arein a certain position are planes of two segmental cams 296 and 296occupying different planes on the periphery .of the web-holder bed 295,to which the said cams are attached, as by screws. Said cams may be-adjustable circumferentially by any usual means. I

of a lug&as at a, 'b

a stitch-cam group, of

fer to provlde sections 2962 296 at their against the face of the camswith which they cooperate. Lever 602 is tooshort to reach the plane ofthe thrust-bar 460, cooperating with the lever 601.

I prefer to provide each of the thrust bars 460 with a. limit step 448,which may be an eccentric disk, as also shown in my said application, todefine with respect to the comb 451 a point upon which the bar may rockwhen permitted by the cams on the drum 120.

The remaining yarn guides F are provided with thrust bars which needhave no adjustment to ccact with the cams on the drum 120.

It will'be apparent that each of the yarn guides F F may be elevated bylifting its thrust bar through a distance corresponding to the lostmotion betweensaid bar and its yarn guide, and then moving said barthrough a further distance, to take its yarn guide to the idle positionshown for guide F Fig. 2, or

to lower it to the operative position shown for guide F", the movementof the bar 460 to render the guide idle or operative thus taking thelugs a and Z1 through a space wholly above the cams 296, 296 and levers601, 602. (Jomparativelyhigh cams fore be provided on the pattern drumfor placing one or both the yarn guides F F in and out of operation byvertical movement of bars 460, without positioning the lugs a and b tomove the bars 460 laterally to enter and remove the yarn guides F F 3 atthe passage of any particular part of the circle of needles. When aseries of movements of the guides occurring repeatedly 11. correspondingto the instep and front of- 501, 502 may thereare permitted to the legof the stocking and the cam 296 maybe associated with the short buttneedles 11. corresponding to the back of the leg, the sole, the heel andthe toe. It will beunden stood, however, that the segment during whichthe yarn guide is be any segment corresponding to the cam for moving thethrust bar for the guide laterally. It will also be evident that thesaid out of action may cams 296 and 296" being attached to the needlecylinder and rotating therewith, and being in immediate connection withthe yarn guides controlled thereby through the intervening parts of thethrust bar, that a direct and positive association with the needles andtherefore of the time of entry and withdrawal of the yarn guide involvedis provided 'for, which is little subject to accidental change.

By the device of thelevers 601, 602 interposed between the moving camsand the lugs on the thrust bars, I am enabled to elerate that thrust barbearing the lug for operation by the lower cam during the passage of theupper cam; under which, if the lugs are in direct contact with the camson the face of the web-holder bed. the said lug would interlock.

By properly proportioning the cams. the gap between their endsrepresents the overlap during which both yarn guides are in a positionto feed their yarn to the same needles and this gap may be regulated bygoverning the dimensions of the cams, with exactness. For the productdesired to be made mere dependence upon the timing of the entrance andexit of the yarns involved is not sufficient to secure inevitably theentrance and exit of the respective yarns at the same needle whenknitting at the high speeds otherwise permitted by the meclr nismu Inorder to secure such accuracy, I may employ mechanism for differentiallypositioning certain of the needles, herein after referred to as sutureneedles n, upon which overlap of the yarn occurs. in such a manner as tobring these needles above the neighboring needles at the time they aregiven the yarn so that an entering yarn posltioned in contact with orjust above the neighboring needles will be firsttaken by the leadingneedle of the suture needles n shown as three in number. but which maycomprise any desired small number as two or four needles. These needleshave shorter butts than the normal short butt needles, as shown in Fig.1.

Referring now to Figs. 1 and 4 the top center cam 8 fast on the cam ring271 is preferably cut away as the cut portion does not stand far enoughinward to contact with the shortest. butt needles 11 All of the needleshaving been advanced by the upper surface 7 of the leading stitch cam 7,the needles n are not depressed so far by the action of the top centercam 8 as the remaining needles and thereforestand at a higher level atthe yarn feeding point which maybe anywhere between the dow'n-going faceof the center cam 8 and the succeeding down-going face of the followingstitcli'cam 6.

Referring now to Fig. 6 a similar result may be secured by forming topcenter ,cam

shown at 10, so that '8 as a slide 8 having a cut away part 8 movingunder impact of the needles on a gib taking into a way S in the back ofthe cam S. (Fig. 11) the lower apex of said cam moving to the left topermit needles n to pass the feeding point while at the higher levelpermitted by the cut 3. to which level they have been moved by thehighest part of the leading stitch cam T.

The yarn thrown out of work in the manner described passes above theinternal yarn guide plate (302 and into the slot 617. in the same manneras the splicing yarn in the machine improved. The lower position of theyarns carried by the guides F F may be. as shown in Fig. 1, such as tocarry the yarn nearly into contact but not into engagement with theneedles'preceding the suture needles. For continuous knitting a yarnpresented in this-position will be taken into the. hooks of all of theneedles. the preceding needle carrying the yarn down and around thecircle into a position to permit all the needles following to take saidyarn.

- I prefer in some cases to position the yarn guides F F at theirentrance and exits by means of lateral movement of their thrustbars. inthree positions, as shown in Fig. 11. of which the lower position 1 issuch as to insure entrance of the yarn to the normally positionedneedles; the second position 2 is such as to insure taking of the yarnby the advanced suture needles; and the third position 3 is an idleposition above the needles. In this case, feeding both yarns to thesuture needles occurs When-the yarn guide going out of work dwells atposition 2 on its movement from position 1 to position 2 and the otheryarn-guide going into work dwells at position 2 on the way from position3 to position 1. movements by the cams 296 and 296 may comprisesegments, Figs. 12 and 13, (I and c. f and 9 having respectivelyopposite active slopes at the same circumferential position, separatedby two intermediate portions of the same height, at which the lev'ers(301, 602 are held in a position to hold both bars 460 outwardly farenough to position their guides F", F at position 2. Fig. 11. The effectof this construction is to lower the entering yarn guide after thesuture needles n have taken the yarn to a normal low 'position, toprevent accidental failure of the normal needlesfollowing the sutureneedles to take a yarn entered at the suture needles.

\Vhen it-is not lgdesired to employ either component yarn of thesplit-foot structure for splicing, I may employ a third guide with a lug5 and a thrust-bar with a lug similar to the lugs ul or 7), as in mysaid machiney to carry the splicing yarn. It is also within my inventionto employ such' a third guide,vand to make a split tube struc- .tureabovethe heel of the stocking by the Means togivethese I of the yarnguides, the presence in themachine of the suture needles n or a similargroup at another point in the series and means for positioning them atthe stitch cams provides a device for localizing the point of change atthe wales from these needies, useful in connection with color changes inthe fabric.

The suture needles a when the split foot structure is being knit will befed at each course with two yarns with respect to which the knitting ofa normal size loop will ordinarily be impracticable, and I may thereforeprovide in connection with said needles webholders 290 having buttsdifferentiated from the remainder; said web-holder cam ring 300 may beprovided with a special webholder cam 312 for moving said web-holder'swith different butts inward at an early time with respect to thestitch-drawing movement at the following stitch cam as described andclaimed in my application Serial No. 746,070

filed February 3, 1913. Such a differential movement of the web-holdersis effective to alter the length of the loop. The cam 312 may beadjusted automatically by an attachment 471 of a thrust bar similar tothe bars 160. When it is intended to splice a segment of fabric such asthe back of the stocking, webholders having high butts may be providedthroughout the segment including the group of suture needles at each endthereof.

One of the guides F2, F 3 may be employed to carry, by reason of itscapacity to beoperated like the other guides, the main'knitting yarn,such for instance as that emplo'ved in the top of the foot in a splitfoot stocking, the arrangement permitting the orderly exchange of thisyarn with the yarn tarried by any one or more of the yarn guides F,bysuitable conformations of the cams at the height of the cams 501, 502,

' and of the cams for the guides F. The said arrangement will alsopermit the use of one of said yarn guide levers for a yarn which may beone component of multiple yarns employed for the heel and toe; and otherarrangements permitted by the structure will be obvious to those skilledin the art.

-When employing one of the guides F F for sectional splicing I provide acam' to lower the yarn guide to be so inserted and withdrawn, the thrustbar beingv dropped far enough to bring its lug a or 1) into con-- tactwith oneof the levers 601, 602 to remove the yarn, for instance duringthe passa e of the high butt needles.

Vhen the yarn guides F, F are employed for split tube knitting, it willbe understood that the product will be comprised of yarns knit as shownin Fig. 9, which figure shows the split portion in course of formation,the yarns w and a: which overlap at opposite points at the needles nfloating idly across the cylinder between the sutures formed at saidneedles n These floats are cut out When the product is finished.

Instead of employing thrust bars 460 with lugs a and Z) for theactuation of the exchanging guides F F I may employ the structureillustrated in Figs. 7 and 8. In this case a thrust bar 460* and a stop448 is provided for each guide as before, but said bars are without lugsa and 6. Associated with said thrust bars 460", I provide short thrustbars 460*, sliding in the same slots in the comb 451, which are cut .05at the top as shown in said figures. Bar 460* is formed with alongitudinal slot 9 in which plays a shouldered screw p fast in the bar460 The bar 460 is provided with a lug a and a similar arrangement foractuating the guide F may also comprise another bar 160 attached to abar 460", said other bar 4:60 carrying a lug ata different heightfromthe lug a.

The guides F and F 3 may now be entered and removed from work by thedirect thrusting action of the bars 460*, under the influence of thecams 502* on the pattern drum 120, independently of the actuation of thethrust bars 460*. Separate cams 501 are provided for moving the bars460.

When the split-tube structure is-to be made, cams 501 permit bars- 460to bring their lugs in range of the means for moving the thrust-barslaterally, the cams 502* permittingthe bars 460 to drop to their lowerposition at this time. a

While I have shown my invention in connection with a circular knittingmachine of the specified type, it will be obvious that it is independentof the construction of the knitting devices.

I am aware that it is not broadly new to make split-foot stockings byproviding means for feeding during continuous rotary knitting asuccession of separate yarns, each being given to one of two segments ofneedles of the circular knitting machine,

and said yarns being overlapped in successlve courses at a needle orneedles taking both yarns, thereby joining'the proximate edges ofadjoining areas knit of each yarn and confining the joint or suture tothe same needle wales. said yarns being removed from the needles tofloat within the circle ofneedles and being again entered at anotherpart of the circle during each revolution of the machine at saidsutures,Such a device and every means is for instance shown and described in thepatent Byram & Fox No. 217,581 dated July 15, 1879, and I do not hereinclaim any for accomplishing the above stated functions.

I claim 1. A knitting machine having a plurality of yarn guides, andmeans operating during successive courses for rendering each of a pairof said yarn guides active and inactive in succession during the samecourse, in combination with means for causing one of said pair of yarnguides to be active and inactive during inactivity and activityrespectively of a third yarn guide at intervals of a plurality ofsuccessive courses, for yarn changing.

2. A knitting machine having a plurality of yarnguides and means forrendering each of said yarn guides active in turn as desired duringinactivity of others, for changing the yarn between'sectionsof thefabric following one after the other, in combination with meanscooperating with a pair of said yarn guides for rendering each of saidpair active and inactive in turnduring each course of a succession ofcourses for repeated yarn changes between sections of the fabric lyingside by side.

3. The combination in a circular knitting machine of needles, aplurality of yarn guides, means for operating each of said yarn guidesto render it active at a pre-. determined segment of said needles, eachof said segments comprising one or more suture needles common to anadjacent segment, and means cooperating with said suture needles tocause entrance and exit of yarns taken by them at a predeterminedneedle'during continuous relative rotation between said needles and yarnguides.

4. The combination in a circular knitting machine of needles, aplurality of yarn guides, means for rendering each of said yarn guidesoperative during continuous rotary knitting at a predetermined segmentof said needles, each of said segments comprising one or more sutureneedles common to an adjacent segment and means cooperating with saidsuture needles to cause entrance and exit of yarns taken by them at apredetermined needle. 1

5. The combination in acircular knitting machine of needles, a pluralityof yarn guides, and devices comprising means relatively fixed withrespect to said needles for rendering each of said yarn guides operativeat'a predetermined segment of said needles each of said segments"comprising 'one or more suture needles common'to an adjacent segment,and means cooperating with said suture needles toadvance them beyond theother needles at the yarn-taking point.

6. In a yarn-changing device for knitting machines, a plurality of yarnguides, ins'truv ments movable independently positively to render eachof said yarn guides inoperative, in combination with needles, means formoving said needles in a single wave to knit, and means having anelement relatively fixed with respect to said needles for moving saidinstruments alternately to place their yarn guides out of operation withrespect to the knitting wave at each course.

7. In a yarn-changing device for knitting machines, a plurality of yarnguides, instru mentsmovable independently positively to render each ofsaid yarn guides inoperative, in combination with needles and meanshaving a cam element relatively fixed with respect to said needles formoving said instru ments alternately to move their yarn guides out ofoperation in two stages and for permitting said yarn guides to return tooperation at later times. '5

8. In a' yarn-changing device. for knitting machines, a plurality ofyarn guides, an instrument movable independently to render eah of saidyarn guides inoperative, in combination with needles 'and meanscomprising cam devices relatively fixed with respect to said needles formoving said yarn guides alternately'with respect to the needles into andout of operation in two positions, the" intermediate stages of saidincoming and outgoing movements being coincident, and operativepositions with respect to some of said needles.

9. -In a knitting machine for knitting split tubular fabrics, thecombination of needles including suture needles, means for positioningsaid suture needles at their yarntaking point differently from theremaining needles, and means for feeding yarn to and Withdrawing yarnfrom the series of needles beginning and ending at said suture needles,

10. In a knitting machine for knitting split tubular fabrics, ,thecombination of needles including suture needles, and means for positioning said suture needles above the other needles at their yarn-takingpoint, in combination with means for entering and withdrawing yarns atsaid suture needles in two stages, the intermediate stage being such asto cause a normally positioned needle to failto take yarn.

11. In a-knitting machine,yarn-changing, yarn-feeding devices, a needlecarrier and independent needles in series having operating butts ofthree'idifi'erent lengths, in com- 12 bination with means acting on theneedle butts, forpositioning one series of said nee.- dles at theyarn-feeding devices difierently from .the other two series, to enableselective entrance and exit of exchanged yarns, 12 at said differentlypositioned needles. 7

1'12. The'combination in a circular knitting machine of "needles, aplurality of yarn with said suture needles to position them differentlyfrom the other needles at the yarn-taking point. 7

13. In a knitting machine, a plurality of yarn guides, instrumentshaving freedom of movement in two dimensions in contact with 'each ofsald yarn guides, means to move said instruments in one dimension topermit said guides to become operative and means to move saidinstruments in another dimension to alternately render one of saidguides inoperative while another is operative.

14. In a knitting machine, a plurality of yarn guides, thrust bars, onein contact with each of said yarn guides, means to move said thrust barsin one dimension to permit said guides to become operative, and means tomove said thrust bars in another dimension to alternately render one ofsaid guides inoperative while another is operative, at each course.

15. In a knitting machine a series of needles, a plurality of yarnguides, bars hav: ing freedom of movement in two dimensions, in contactwith each of said yarn guides, pattern devices to move each of said barsto permit said guides to become operative and cams relatively fixed withrespect to .said needles to move said instruments in a direction lateralof said first mentioned movement to alternately render one of saidguides inoperative while ative.

16. In a knitting machine, yarn guides, instruments having freedom ofmovement in two dimensions in contact with each of said yarn guides,means to move said instruments in one direction to permit said guides tobecome operative, and means comprising cams relatively fixed withrespect to said needles to move said instruments laterally of saiddirection to alternately render one or more of said guides inoperativeWhile another is operative to exchange yarns at a predetermined needleor needles in successive courses.

17. Ina knitting machine a series of needles, a series of movable ya,guides, and instruments in contact therewit for rendering said yarnguides operative or inoperative independently of each other,-,incombination with means for independently moving each of said instrumentsin one direction for the actuation of its yarn guide, and

another is opermeans comprising cams relatively'fixed with ing each ofsaid instruments laterally of said direction to determine actuation ofits yarn guide with respect to .a predetermined part of said series ofneedles.-

18. In a knitting machine a plurality of yarn guides, each having a camsurface thereon, an instrument for each of said yarn guides, and meansto move said instruments in the direction of their length to rendertheir respective yarn guides inoperative, in combination with means forselectively moving each of the said instruments laterally against thesaid cam surface of its yarn guide at predetermined times to remove 76said guide from an operative position.

19. In a knitting machine, a plurality of yarn guides, each having a camsurface thereon, an instrument for each yarn guide,

spaced from contact therewith when in one 80 position, means active whensaid instruments are in said position only to cause each of saidinstruments to move into contact with the cam-surface of and to actuateits yarn guide, in combination with devices acting atpredetermined'times to move one or more of" saidinstrumentsindependently out of said position directly to contact withand actuate its yarn-guide.

20. In a circular knitting machine, a knitting head'having a rotatingpart, a plurality of yarn guides each having a cam surface thereon, athrust bar for each yarn guide, spaced from contact therewith when inone position, means having a part rotating with said rotating elementand a part in contact with oneof said thrustbars when said thrust barsare in said position only, to cause lateral movement of said thrust barinto contact with the cam surface of and to actuate its yarn guide,.incombination with devices acting at'predetermined times to move one ormore of said thrust bars out of said position directly into contact withand to actuate its yarn guide.

21. In a circular knitting machine, needles, yarn guides, and means forrendering each of said yarn guides operative at a predetermined segmentof said needles only, each of said segments comprising one or moresuture needles common to an adjacent segment, in combination with meansfor 10- cally elongating the stitches at said suture needles.

22. The combination in a circular knitting machine of needles, yarnguides, and means for rendering each ofsaidyarn guides operative at apredetermined segment of said needles only during predetermined times,each of said segments comprising one or more suture needles common to anadjacent segment, in combination with means for 10- cally elongating thestitch at said suture needles, at said times, and for knitting a normallength of stitch thereat at other 126 respect to said needles foralternately movtimes.

said thrust bars in one direction to permit 13! said guides to becomeoperative,1ugs on said bars at different points for each bar and 7 meansin contact with said lugs in one .position of said bars independently tomove said bars in another direction.

24. In 'a knitting machine, a plurality of yarn guides, a rotatingneedle carrier, thrust bars, one for contact with each of said yarnguides, means to move said thrust bars vertically to permit said guidesto Become operative, lugs on said bars at different heights, levers indifferent vertical planes, and a cam rotating with the needle carrier tomove each lever against one of said lugs to move a thrust bar laterally.

25. In a knitting machine, the combination with needles having butts ofdifferent lengths, of means for feeding yarn, stitch cams, and a topcenter cam having a lower apex and a cut-away portion, with a mount- 20In testimony whereof, I have signed my 25 name to this specification inthe presence of two subscribmg w1tnesses.

ROBERT SCOTT.

' Witnesses:

MARY F. GRIFFIN, Mnvo'r G. CROZIER.

